I would argue that, more than anything else, the main thing that we can take away from this video is not a set idea or action, like install solar panels or use less water, but perhaps a willingness to reconsider our traditional views of the effects of charity on those receiving end, and look into alternate charitable options, like microfinancing.
In terms of what we can do, I'd say the best thing would be to invest in or donate to a microfinancing firm such as Acumen. Even a relatively small amount of money can make a huge difference, and continue making a difference, because it will not be a simple one-time handout, but a self-regenerating investment in the future of someone in need.
I think one of the most useful things we can do is change the way that we talk about and the way that we frame the process of giving charity and assistance to Africa. The video really gets down in to the nitty-gritty details of aid distribution, especially when she talks about malaria net distribution. However, it also talks a lot about the many meta-issues of aid to Africa, such as the failure of many to take into account the actual opinions of aid receivers and the failure to consider nontraditional ways of going about giving aid to Africa.